The net photosynthesis of the evergreenspecies was the highest in autumn and the lowest when the plants were in the period of concentrate change of leaves.
常绿树种的光合速率在秋季最高，大量换叶期最低，冬季仍有一定的净光合量。
3
The dogwood is a species of evergreen arbor; it is heavy-scented plant whose fruit is edible and stock and leaves can be medicinal materials.